cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A241301 Number of n X 2 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4.

Table of values

n a(n)
1 2
2 6
3 6
4 12
5 16
6 28
7 38
8 66
9 92
10 154
11 222
12 362
13 532
14 854
15 1272
16 2018
17 3036
18 4776
19 7236
20 11316
21 17230
22 26832
23 41000
24 63658
25 97516
26 151086
27 231858
28 358688
29 551144
30 851718
31 1309890
32 2022722
33 3112810
34 4804190
35 7396624
36 11411300
37 17574716
38 27106414

List of values

[2, 6, 6, 12, 16, 28, 38, 66, 92, 154, 222, 362, 532, 854, 1272, 2018, 3036, 4776, 7236, 11316, 17230, 26832, 41000, 63658, 97516, 151086, 231858, 358688, 551144, 851718, 1309890, 2022722, 3112810, 4804190, 7396624, 11411300, 17574716, 27106414]